There are four stages of sleep that make up a sleep cycle. Over the course of a night, your brain will transition through the various stages of sleep multiple times.
Infographic Stages Of Sleep And Sleep Cycles by Zameer Havaldar on Dribbble
Do sleepwalkers sleepwalk during REM sleep? If so, why? - Quora
What Is Core Sleep vs. Deep Sleep?
:max_bytes(150000):strip_icc()/the-four-stages-of-sleep-2795920_FINAL-5c05c2fc46e0fb00018dac3d.png)
4 Stages of Sleep: NREM, REM, and the Sleep Cycle
Applied Sciences, Free Full-Text
The Five Sleep Cycle Stages Explained –
What Is Core Sleep vs. Deep Sleep?
What Are The 4 Stages Of Sleep & What Does Each Stage Do?
Rapid eye movement (REM sleep) - Deepstash
Sleep: Stages And Sleep Cycle, Functions